Amechanical device requires 500j of work to do 200j of work in lifting a box. what is the efficiency of the device?

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length